initial commit

internal/core/getcategory.go

@@ -0,0 +1,49 @@
+package core
+
+import (
+	"context"
+	"fmt"
+
+	"git.loyso.art/frx/eway/internal/entity"
+)
+
+type GetCategoryParams struct {
+	ID   int64
+	Name string
+}
+type GetCategoryResult struct {
+	Category entity.Category
+}
+
+type GetCategoryAction Action[GetCategoryParams, GetCategoryResult]
+
+type getCategoryAction struct {
+	baseAction
+}
+
+func NewGetCategoryAction(env *Env) ActionDecorator[GetCategoryParams, GetCategoryResult, GetCategoryAction] {
+	ba := newBaseAction(env)
+
+	action := &getCategoryAction{
+		baseAction: ba,
+	}
+
+	return applyDecorators(action)
+}
+
+func (a *getCategoryAction) Do(ctx context.Context, params GetCategoryParams) (result GetCategoryResult, err error) {
+	id := params.ID
+	if params.Name != "" {
+		id, err = a.env.mapper.CategoryNameToID(ctx, params.Name)
+		if err != nil {
+			return result, fmt.Errorf("resolving category id: %w", err)
+		}
+	}
+
+	result.Category, err = a.env.repository.Category().Get(ctx, id)
+	if err != nil {
+		return result, fmt.Errorf("getting category: %w", err)
+	}
+
+	return result, nil
+}